diff --git a/PROMS/Volian.Controls.Library/DisplayTabItem.cs b/PROMS/Volian.Controls.Library/DisplayTabItem.cs
index 89473765..49b0443a 100644
--- a/PROMS/Volian.Controls.Library/DisplayTabItem.cs
+++ b/PROMS/Volian.Controls.Library/DisplayTabItem.cs
@@ -166,6 +166,7 @@ namespace Volian.Controls.Library
 			Text = _MyItemInfo.TabTitle;
 			Tooltip = _Tooltip = _MyItemInfo.TabToolTip.Replace("\u2011", "-");
 			MouseMove += new System.Windows.Forms.MouseEventHandler(DisplayTabItem_MouseMove);
+			LostFocus += new EventHandler(DisplayTabItem_LostFocus);
 			//
 			_MyDisplayTabControl.Controls.Add(_MyStepTabPanel);
 			_MyDisplayTabControl.MyBar.Items.Add(this);
@@ -180,8 +181,11 @@ namespace Volian.Controls.Library
 			if (dvi == null) return;
 			if (dvi.VersionType > 127)
 				MyStepTabPanel.MyStepPanel.PanelViewEditMode = E_ViewMode.View;
-
-			
+		}
+		void DisplayTabItem_LostFocus(object sender, EventArgs e)
+		{
+			if(Tooltip != _Tooltip)
+				Tooltip = _Tooltip;
 		}
 		private string _Tooltip;
 		void DisplayTabItem_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
@@ -205,6 +209,7 @@ namespace Volian.Controls.Library
 			Text = _MyItemInfo.TabTitle;
 			Tooltip = _Tooltip = _MyItemInfo.TabToolTip.Replace("\u2011", "-");
 			MouseMove += new System.Windows.Forms.MouseEventHandler(DisplayTabItem_MouseMove);
+			LostFocus += new EventHandler(DisplayTabItem_LostFocus);
 			_MyDisplayTabControl.Controls.Add(_MyDSOTabPanel);
 			DSOTabPanel.IgnoreEnter = true;
 			//Console.WriteLine("AddRange {0}", Name);
@@ -229,7 +234,8 @@ namespace Volian.Controls.Library
             DocumentConfig dc = new DocumentConfig(_MyDocumentInfo);
 						Tooltip = _Tooltip = dc.LibDoc_Comment;
 			MouseMove += new System.Windows.Forms.MouseEventHandler(DisplayTabItem_MouseMove);
-            _MyDisplayTabControl.Controls.Add(_MyDSOTabPanel);
+			LostFocus += new EventHandler(DisplayTabItem_LostFocus);
+			_MyDisplayTabControl.Controls.Add(_MyDSOTabPanel);
             DSOTabPanel.IgnoreEnter = true;
             _MyDisplayTabControl.MyBar.Items.AddRange(new DevComponents.DotNetBar.BaseItem[] {
             this});